Question

What psychological effect makes notes on a piano that are an octave apart sound the same?​

Answer 1

• The effect is not psychological.

• It is physical.

• Notes on a piano that are separated by an octave are very similar physically.

• To understand why this is so, you have to understand first the basics of sound.

Answer 2

The effect is not psychological. It is physical. Notes on a piano that are separated by an octave are very similar physically.